protective custody

keeping a person in prison (supposedly) for his own safety 保护性监禁.

prosperity, prosperous, prosperously, prostate, prosthesis, prosthetic, prostitute, prostitution, prostrate, prosy, Prot, prot(o)-, protagonist, protean, protect, protect...from, protection, protectionism, protectionist, protective, protectively, protector, protectorate, protege (fem 阴性作 protegee), protein, protein-rich, protest, Protestant, Protestantism, protestation, protester, protestingly, protocol, proton, protoplasm, prototype, protozoan, protozoon (also protozoan), protract, protracted,